View Single Post
Old 09-27-12, 01:07 AM   #69
nexsuperne
Helper EcoRenovator
 
Join Date: Feb 2012
Location: 30 miles east of London, UK
Posts: 88
Thanks: 12
Thanked 19 Times in 18 Posts
Default

Quote:
Originally Posted by AC_Hacker View Post
Why don't you do a break-even analysis? ... (LINK HERE)

-AC
Bit of a no brainer really, I pay £2 for a 50 watt halogen bulb, which emits 320 lumen and costs 0.5p an hour to run. I then pay £3 for a 7.5 watt 520 lumen led bulb, which costs 0.075p an hour to run. Every hour I save 0.425p by using the led.
In 236 hours, the extra £1 I paid for the bulb will be repaid in running cost savings. Typically, with the lights on for 5 hours a night, this is just just short of 7 weeks.
Leds should last 30,000 hours, so if that was the case would save 12,750p (£127.50) on each bulb.
In my case, I have 20 of these, so would save £2550! Compared to 50w halogen.
nexsuperne is offline   Reply With Quote
The Following User Says Thank You to nexsuperne For This Useful Post:
classradiance (09-27-12)